#!/bin/sh
BOY="boys"
echo "hello "$BOY""
echo "hello $BOY"
echo "hello "${BOY}""
echo "hello ${BOY}"

GIRL=girls
echo "hello '$GIRL'"
GIRL='girls'
echo "hello '$GIRL'"
GIRL="girls"
echo "hello '$GIRL'"
 
echo `date`

[ -x child.sh ]
echo $?
test -x child.sh
echo $?
